<?php
/** 
* 获取图象信息的函数 
* 
* 一个全面获取图象信息的函数 
* 
* @access public 
* @param string $img 图片路径 
* @return array 
*/ 



function GetImageInfoVal($ImageInfo,$val_arr) { 
$InfoVal = "未知"; 
foreach($val_arr as $name=>$val) { 
if ($name==$ImageInfo) { 
$InfoVal = &$val; 
break; 
} 
} 
return $InfoVal; 
} 
function GetImageInfo($img) { 
$imgtype = array("", "GIF", "JPG", "PNG", "SWF", "PSD", "BMP", "TIFF(intel byte order)", "TIFF(motorola byte order)", "JPC", "JP2", "JPX", "JB2", "SWC", "IFF", "WBMP", "XBM"); 
$Orientation = array("", "top left side", "top right side", "bottom right side", "bottom left side", "left side top", "right side top", "right side bottom", "left side bottom"); 
$ResolutionUnit = array("", "", "英寸", "厘米"); 
$YCbCrPositioning = array("", "the center of pixel array", "the datum point"); 
$ExposureProgram = array("未定义", "手动", "标准程序", "光圈先决", "快门先决", "景深先决", "运动模式", "肖像模式", "风景模式"); 
$MeteringMode_arr = array( 
"0" => "未知", 
"1" => "平均", 
"2" => "中央重点平均测光", 
"3" => "点测", 
"4" => "分区", 
"5" => "评估", 
"6" => "局部", 
"255" => "其他" 
); 
$Lightsource_arr = array( 
"0" => "未知", 
"1" => "日光", 
"2" => "荧光灯", 
"3" => "钨丝灯", 
"10" => "闪光灯", 
"17" => "标准灯光A", 
"18" => "标准灯光B", 
"19" => "标准灯光C", 
"20" => "D55", 
"21" => "D65", 
"22" => "D75", 
"255" => "其他" 
); 
$Flash_arr = array( 
"0" => "flash did not fire", 
"1" => "flash fired", 
"5" => "flash fired but strobe return light not detected", 
"7" => "flash fired and strobe return light detected", 
); 
if (!function_exists("exif_read_data")){
	$new_img_info = array ("错误提示" => "该服务器不支持exif_read_data函数，无法读取图片EXIF信息"); 
	return $new_img_info;
}
$exif = @exif_read_data ($img,"IFD0"); 
if ($exif===false) { 
$new_img_info = array ("文件信息" => "没有图片EXIF信息"); 
} 
else 
{ 
$exif = @exif_read_data ($img,0,true); 
$new_img_info = array ( 
"<b>文件信息</b>" => "-----------------------------", 
"文件名" => $exif['FILE']['FileName'], 
"文件类型" => $imgtype[$exif['FILE']['FileType']], 
"文件格式" => $exif['FILE']['MimeType'], 
"文件大小" => $exif['FILE']['FileSize'], 
"时间戳" => date("Y-m-d H:i:s",$exif['FILE']['FileDateTime']), 
"<b>图像信息</b>" => "-----------------------------", 
"图片说明" => $exif['IFD0']['ImageDescription'], 
"制造商" => $exif['IFD0']['Make'], 
"型号" => $exif['IFD0']['Model'], 
"方向" => $Orientation[$exif['IFD0']['Orientation']], 
"水平分辨率" => $exif['IFD0']['XResolution'].$ResolutionUnit[$exif['IFD0']['ResolutionUnit']], 
"垂直分辨率" => $exif['IFD0']['YResolution'].$ResolutionUnit[$exif['IFD0']['ResolutionUnit']], 
"创建软件" => $exif['IFD0']['Software'], 
"修改时间" => $exif['IFD0']['DateTime'], 
"作者" => $exif['IFD0']['Artist'], 
"YCbCr位置控制" => $YCbCrPositioning[$exif['IFD0']['YCbCrPositioning']], 
"版权" => $exif['IFD0']['Copyright'], 
"摄影版权" => $exif['COMPUTED']['Copyright.Photographer'], 
"编辑版权" => $exif['COMPUTED']['Copyright.Editor'], 
"<b>拍摄信息</b>" => "-----------------------------", 
"Exif版本" => $exif['EXIF']['ExifVersion'], 
"FlashPix版本" => "Ver. ".number_format($exif['EXIF']['FlashPixVersion']/100,2), 
"拍摄时间" => $exif['EXIF']['DateTimeOriginal'], 
"数字化时间" => $exif['EXIF']['DateTimeDigitized'], 
"拍摄分辨率高" => $exif['COMPUTED']['Height'], 
"拍摄分辨率宽" => $exif['COMPUTED']['Width'], 
/* 
The actual aperture value of lens when the image was taken. 
Unit is APEX. 
To convert this value to ordinary F-number(F-stop), 
calculate this value's power of root 2 (=1.4142). 
For example, if the ApertureValue is '5', F-number is pow(1.41425,5) = F5.6. 
*/ 
"光圈" => $exif['EXIF']['ApertureValue'], 
"快门速度" => $exif['EXIF']['ShutterSpeedValue'], 
"快门光圈" => $exif['COMPUTED']['ApertureFNumber'], 
"最大光圈值" => "F".$exif['EXIF']['MaxApertureValue'], 
"曝光时间" => $exif['EXIF']['ExposureTime'], 
"F-Number" => $exif['EXIF']['FNumber'], 
"测光模式" => GetImageInfoVal($exif['EXIF']['MeteringMode'],$MeteringMode_arr), 
"光源" => GetImageInfoVal($exif['EXIF']['LightSource'], $Lightsource_arr), 
"闪光灯" => GetImageInfoVal($exif['EXIF']['Flash'], $Flash_arr), 
"曝光模式" => ($exif['EXIF']['ExposureMode']==1?"手动":"自动"), 
"白平衡" => ($exif['EXIF']['WhiteBalance']==1?"手动":"自动"), 
"曝光程序" => $ExposureProgram[$exif['EXIF']['ExposureProgram']], 
/* 
Brightness of taken subject, unit is APEX. To calculate Exposure(Ev) from BrigtnessValue(Bv), you must add SensitivityValue(Sv). 
Ev=Bv+Sv Sv=log((ISOSpeedRating/3.125),2) 
ISO100:Sv=5, ISO200:Sv=6, ISO400:Sv=7, ISO125:Sv=5.32. 
*/ 
"曝光补偿" => $exif['EXIF']['ExposureBiasValue']."EV", 
"ISO感光度" => $exif['EXIF']['ISOSpeedRatings'], 
"分量配置" => (bin2hex($exif['EXIF']['ComponentsConfiguration'])=="01020300"?"YCbCr":"RGB"),//'0x04,0x05,0x06,0x00'="RGB" '0x01,0x02,0x03,0x00'="YCbCr" 
"图像压缩率" => $exif['EXIF']['CompressedBitsPerPixel']."Bits/Pixel", 
"对焦距离" => $exif['COMPUTED']['FocusDistance']."m", 
"焦距" => $exif['EXIF']['FocalLength']."mm", 
"等价35mm焦距" => $exif['EXIF']['FocalLengthIn35mmFilm']."mm", 
/* 
Stores user comment. This tag allows to use two-byte character code or unicode. First 8 bytes describe the character code. 'JIS' is a Japanese character code (known as Kanji). 
'0x41,0x53,0x43,0x49,0x49,0x00,0x00,0x00':ASCII 
'0x4a,0x49,0x53,0x00,0x00,0x00,0x00,0x00':JIS 
'0x55,0x4e,0x49,0x43,0x4f,0x44,0x45,0x00':Unicode 
'0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00':Undefined 
*/ 
"用户注释编码" => $exif['COMPUTED']['UserCommentEncoding'], 
"用户注释" => $exif['COMPUTED']['UserComment'], 
"色彩空间" => ($exif['EXIF']['ColorSpace']==1?"sRGB":"Uncalibrated"), 
"Exif图像宽度" => $exif['EXIF']['ExifImageLength'], 
"Exif图像高度" => $exif['EXIF']['ExifImageWidth'], 
"文件来源" => (bin2hex($exif['EXIF']['FileSource'])==0x03?"digital still camera":"unknown"), 
"场景类型" => (bin2hex($exif['EXIF']['SceneType'])==0x01?"A directly photographed image":"unknown"), 
"缩略图文件格式" => $exif['COMPUTED']['Thumbnail.FileType'], 
"缩略图Mime格式" => $exif['COMPUTED']['Thumbnail.MimeType'] 
); 
} 
return $new_img_info; 
} 
function load_imgexifinfo($img){
$innerhtml = ""; 
$exif = GetImageInfo($img); 
$innerhtml .= "<TABLE>"; 
foreach($exif as $name=>$val) { 
$innerhtml .= "<TR><TD>{$name}:</TD><TD>{$val}</TD></TR>"; 
} 
$innerhtml .= "<TR><TD colspan=\"2\">"; 
if (function_exists("exif_thumbnail")){
	if ($img) { 
	$image = @exif_thumbnail($img); 
	} else { 
	$image = false; 
	} 
	if ($image!==false) { 
	$innerhtml .= "<img src=\"thumbnail.php?img=".$img."\">"; 
	} else { 
	// no thumbnail available, handle the error here 
	$innerhtml .= "没有缩略图片(No thumbnail available)"; 
	}
}else{
	$innerhtml .= "服务器不支持exif_thumbnail函数,无法使用缩略图片功能。";
}
$innerhtml .= "</TD></TR></TABLE>"; 
//print_r($exif);
return $innerhtml;
}
?>